Electrochemical sensor based on nickel phthalocyanine conjugated polymer for selective detection of p-aminophenol

被引:0
|
作者
Cai, Xue [1 ]
Tao, Rui [1 ]
Li, Meitong [1 ]
Yun, Xinyu [1 ]
Yang, Xinyu [1 ]
Sun, Jiayue [1 ]
Wei, Chuangyu [1 ]
机构
[1] Mudanjiang Normal Univ, Coll Chem & Chem Engn, Heilongjiang Key Lab Photoelect Funct Mat, Mudanjiang 157011, Peoples R China
关键词
Electrochemical sensor; Nickel phthalocyanine polymer; p-Aminophenol; Cyclic voltammetry; Differential pulse voltammetry; GRAPHENE; ADSORPTION; SURFACE;
D O I
10.1016/j.microc.2025.113191
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
This work reports an advanced, high-efficiency electrochemical sensor for detecting p-aminophenol (p-AP), based on a nickel phthalocyanine polymer containing an S-linker. The nickel phthalocyanine polymer was synthesized via the cyclization reaction with ortho-positioned dicyano groups. The nickel phthalocyanine polymer was drop-coated on GCE to form a modified electrode (PNiPc@GCE), which demonstrated sensitive electrochemical responses. Optimal conditions for preparing the modified electrode and detecting p-AP were selected through electrochemical experiments. Cyclic voltammetry (CV) curves at different rates (20 mV s(-1) similar to 200 mV/s) indicated that the oxidation of p-AP follows a diffusion-controlled process on the surface of the PNiPc@GCE electrode. The p-AP, in the range of 0.1 similar to 1000 mu M, was detected using DPV curves, displaying a good linear response under optimal conditions. The sensitivity was determined to be 21.70 mA mu M-1 cm(-2), and the LOD was 20 nM (S/N = 3). Furthermore, the recovery experiments were conducted at different concentration levels in practical water samples, showing relatively satisfactory recoveries and indicating the potential of the PNiPc@GCE sensor for quantitative detection of p-AP molecules in practical applications. Following storage at room temperature for eight weeks, the sensor remained at 95 % of its original peak current, with negligible interference. Therefore, the developed sensor made a valuable contribution to advancing electrochemical sensing technology and its application in the environment.
引用
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页数:10
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